AirOtop Enhanced Flask Seals are sterile, hydrophobic 0.2 µm vented seals that replace loose caps and foams to deliver high oxygen transfer while maintaining a clean microbial barrier. As part of Thomson’s Ultra Yield System, customers report substantially higher cell densities and—when paired with Ultra Yield Flasks and Plasmid+ Media—plasmid yields up to 610%.Key features •0.2 µm hydrophobic membrane for high gas exchange with reliable microbial containment•Resealable for ~24 hours to enable sampling or additions without changing closures•Sterile, single-use format to reduce contamination risk and cleanup•Multiple sizes to fit common shake-flask formats•Compatible with glass flasks and Ultra Yield Flasks